Vulnerability Description
A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Build Of Keycloak | >= 26.4, < 26.4.10 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:3947Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3948Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-2575Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2440149Issue TrackingVendor Advisory
FAQ
What is CVE-2026-2575?
CVE-2026-2575 is a vulnerability with a CVSS score of 5.3 (MEDIUM). A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. ...
How severe is CVE-2026-2575?
CVE-2026-2575 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2575?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Build Of Keycloak.